Automatic speed and vacuum controlling device



Ju ne 28, 1938.

A. o. TADEWALD AUTOMATIC SPEED AND VACUUM CONTROLLING DEVICE Filed Feb. 15, 1957 2 Sheets-Sheet l June 28, 1938 A. o. TADEWALD AUTOMATIC SPEED AND VACUUM CONTROLLING DEVICE Filed Feb. 15, 1937 2 Sheets-Sheet 2 anew 14 w Patented June 28, 1938 PATENT OFFICE AU'roMA'rIo srann AND vAcUUM con- Y TROLLING DEVICE Albert 0. me u, La Crosse, we. Application February 15, 1937, Serial No. 125,913

6 Claims.

This invention relates to a speed and vacuum controlling device of that type having as an element thereof a piston and aims to provide, in a manner as hereinafter set forth, a device operated by and dependent upon the intake manifold vacuum which will produce any desired stabilization of the vacuum in the intake manifold for the purpose of automatically controlling by vacuum acceleration and deceleration of the speed of 10 internal combustion engines used in connection with automotive vehicles; also to eliminate the stalling of the windshield wiperdue to drop in vacuum of intake manifold; to prevent a too V rapid advance or retard on vacuum controlled ignition depending upon its design; improving operation of all vacuum controlled or operated accessories attached to the intake manifold vacuum of an internal combustion engine.

The speed of the engine of an automotive vehicle is regulated by the butterfly valve in the carburetor. When the engine of the vehicle is running normally, there is a vacuum created in the intake manifold which sucks air through the venturi of a carburetor and causes the gasoline 5 to vaporize. If one presses his foot on the accelerator, it moves the butterfly valve in the carburetor so as to increase or decrease the speed of the engine. when the engine is running at a fairly normal speed, the air adjustment of the carburetor worksperfectly. However, when the engine is operating at a fairly slow speed and one A presses down on the foot throttle, it causes the butterfly valve to open abruptly. By reason of the slow speed of the engine, the vacuum in the intake manifold is so reduced that the windshield wiper stalls, the spark on vacuum controlled distributor advances or retards beyond its proper angle and the gasoline coming into the carburetor is improperly mixed which results in the stalling and sputtering of the engine, which is very objectionable. It is the aim of this invention to provide, in a manner as hereinafter set forth, a device for installationin relation to the carburetor, intake manifold and gasoline pump of the engine of an automotive vehicle for overcoming the objection'aforesaid as well as providing a practical vacuum controlled manifold for acceleration and deceleration relative to the speed of the engine.

A further object of the invention is the elimination of dangerous gases by controlling the ac-' celerating pump to eliminate the injection of fuel oil when a high manifold pressure is present.

A further object of the invention is to control the amount of fuel oil injection in proportion to the vacuum in the intake manifold and prevent a too rich mixture.

Further objects of the invention are to provide, in a manner as hereinafter set forth, a device for the purposes A referred to which is simple in its 5 construction and arrangement, strong, durable,

compact, thoroughly eflicient in its use, readily set up, conveniently installed with respect to an internal combustion engine, and comparatively inexpensive to manufacture. 10

With the foregoing and other objects in view, the invention consists of the novel construction, combination and arrangement of parts as will be more specifically referred to and are as illustrated in the accompanying drawings wherein'is shown 15 the speed controlling device in accordance with 25 this invention,

Figure 2 is a top plan view of the device,

Figure 3 is a side elevation of the device installed relative to the carburetor and intake manifold of the engine, and 30 Figure 4 is a section on line 4-4, Figure 2.

Referring to the drawings, 5 generally indicates an internal combustion engine which includes an air filtering means 6 communicating'with the carburetor l. The intake manifold of the engine 5 35 is designated at 8 and the oil pump which communicates with the carburetor l is indicated at 9.

ing means for the butter-fly 'valve of the 'carburetor is designated generally at l0 and includes a manually operated pull rod H and a foot operated mechanism II which is ,connected with rod H for the purpose of shifting it; The arrange- 50 ment of the means I0 is such that the butter-fly valve or what may be termed the throttle valve can be operated by a manual pull or foot pressure.

The carburetor l is of the down-draft type and is flanged as at 13 at its lower end. The intake manifold 8 is flanged at its upper end as at M.

' Flanges l3 and M are arranged in aligned spaced relation. Interposed between the flanges l3 and I4 is the outer end of an arm l5 formed with an opening I6 having its wall aligning with the inner faces of the lower end of the carburetor 1 and upper end of the manifold 8. The arm I5 provides a mounting for a butter-fly valve i1 which is formed with an idling port I8. The valve I1 is fixed to a shaft l9 which is journaled in and projects laterally from one side of the arm I5.

Interposed between the arm l5 and flange I3 is a holdfast means 26, 21 which function to clamp.

the carburetor, the intake manifold, the arm l5 and the packings 20 and 2| togethen.

The arm I5 and butter-fly valve |1 form elements of the speed controlling device in accordance with this invention. The arm I5 is integral with and extends from one side of a supporting plate 28 which is anchored to one side of the engine 5 in proximity to the intake manifold 8.

Opposing the plate 28 and disposed lengthwise thereof is a cylinder 29 provided at each end with a. pair of oppositely extending apertured spacers 30 through which extend holdfast devices 3| acting to anchor cylinder 29 to and in spaced relation with respect to plate 28. The cylinder 29 includes an annular body part 32 which is open at its inner end. Body part 32 at its inner end is formed with peripheral threads 33. The outer end of body part 32 merges into a head 34 formed with an axial opening 35 and an inwardly ex tending collar 36 having its inner face registering with the wall of the aperture. The inner face of the collar 3 -3 and wall of the aperture 35 are threaded. Threadedly engaging with the threads 33 is a cap-like head 31 for closing the inner end of cylinder 32. The head 31 has an axial opening 38 through which extends a piston rod 39. Encompassing the collar 35 and bearing against the inner face of the body part 32 is an annulus 40 preferably formed of leather or other suitable material. The annulus 40 bears against the inner face of the head 34 and extends inwardly from the inner end of the collar 36 and provides a seat for a piston 4| which is carried by the inner end of the rod 39. Piston 4| secured thereto a packing means 42 which is arranged against that face of the piston into which the piston rod 39 extends.

The outer end of the piston rod 39 is provided with a yoke 43. A link as has one-endl thereof extending into the yoke 43 and such end is pivotally connected to the yoke 43 as at 54. Fixed to the outer end of the shaft |9 is a bell crank' lever 46 having its arms indicated at 41, 48. The

arm 41 has its outer end provided with a yoke 49 into which extends the other end of the link 44 outer end of the arm 48 of the bell crank 46 is provided with a yoke 53. Extending into the yoke 53 is the lower end of the link EZ'and such lower; end is pivotally connected to the yoke 53 as at 54.

The piston rod 33 intermediate its ends is threaded as at 55. Positioned on the piston rod 39 is a washer 56. Encompassing the piston rod 39 and interposed between the washer 56 and the head 31 is a coiled spring 51. Engaging with the threads 55 of the piston rod 39 is an adjusting nut 58., The spring 51 is a calibrating spring and the nut 58 is a calibrating nut.

Threadedly engaging with the wall of opening 35 and inner face of collar 35 is a flanged nipple 59. The intake manifold 8 has a threaded opening 68 in which is secured a flanged nipple 6|. Connected to and extending from the nipple 59 and connected to the nipple 6| is a pipe line 62 for establishing communication between the chamber 63 provided by the cylinder 29 and the intake manifold 8. The showing in Figure 3 represents the device in a position when engine is not running. When the motor is started the vacuum from the intake manifold pulls the piston 4| against the seat provided by the annulus 40 and closes the nipple 59. As the piston 4| moves toward the annulus 49 the piston rod 39 is carried therewith and provides for the shifting, the direction of the arrow A of the butter-fly valve H which is disposed between the carburetor and the intake manifold and permits the carburetor being free to operate, as normal when intake manifold vacuum is above three to four inches, with this exception thatthe fuel oil accelerating pump 9 is in its injecting position and controlled by the device, instead of it being operated manually by the foot feed. When the driver steps on the foot operated mechanism H, with a great deal of force, the throttle valve which is above the valve i1 opens completely and the vacuum in the intake manifold drops rapidly, but cannot go below the vacuumat which the calibrated nut and spring is set. It will be assumed that the calibrated'spring has been set to hold the valve H at an angle to maintain the manifold vacuum above zero or three to six inches. Now, when the driver steps on the mechanism with force, the piston rod partly closes the valve i1 and keeps the intake manifold vacuum above zero, at the same time, due to the action of the piston rod the injecting'means of the accelerating pump is operated for the purpose of injecting combustible fuel oil into the manifold needed for quick ac-- celeration, and as there is a vacuum in the manifold the fuel oil will be absorbed immediately.

By preventing'the vacuum in the intake mani fold to drop to zero it prevents the stalling and stuttering of the engine.

The air enters the cylinder 29 through the opening 38 in the head 3'5. The arrow B indicates the direction of movement of rod 39 when a vacuafter the motor is cylinder 29 and such vacuum is caused by the communication of the conduit '52 with thecylinder and with the intake manifold when the engine is operating. The spring and nut further constitutes a means for adjusting the piston rod.

The spring and nut further constitutes a means for adjusting the desired manifold pressure at heavy loads or slow speeds and also determines when the fuel oil is to be injected.

The device also provides for the elimination of dangerous gases due to the unnecessary injection of fuel oil on the manual operation of the accelerating pump. The dangerous gases are eliminated by the control of the accelerating pump in a manner to eliminate the injection of fuel oil when there is a high manifold vacuum. The

device also controls the amount of fuel oil in-' jected in proportion to the vacuum of the intake manifold and prevents too rich a mixture.

What I claim is:

1. In a speed controlling device for internal combustion engines of automotive vehicles, a carburetor having a throttle, an operable valve controlling manifold vacuum adapted to be interposed between the carburetor and intake manifold of the engine, an actuating link for and adapted to be connected to and for controlling the in jecting means of a fuel oil accelerating pump, operating means for and common to said valve and said link, and a vacuum controlled structure having means for establishing communication.

between it and the intake manifold of the engine, said structure including a reciprocatory mechanism travelling inone direction, when the engine is started, for moving said operating means in a direction to open said valve and for shifting said link in a direction to make inactive the injecting means of the accelerating pump and travelling in an opposite direction, when the throttle of the engine is completely opened, for moving said operating means in a direction to shift said valve ina closing direction and said link in a direction to make active the injecting means of the acceleratng pump, said mechanism including means for limiting the extent of the closing movement of the valve to prevent the vacuum in the manifold dropping to ,a point in proximity to zero.

2. In a speed controlling device for internal combustion engines of automotive vehicles, a carburetor having a throttle, an operable valve controllingmanifold vacuum adapted to be interposed between the c'arburetor and intake manifold of the engine, an actuating link for and adapted to be connected to and for controlling the injecting means of a fuel oil accelerating pump operating means for and common to said valve and said link, a vacuum controlled structure having means for establishing communication between it and the intake manifold of the engine, said structure including a reciprocatory mechanism travelling in one direction, when the engine is started, for moving said operating means in a direction to open said valve and for shifting said link in a direction to make inactive the injecting means of the accelerating pump and travelling in an opposite direction, when the throttle of the engine is completely opened, for moving said operating means in a direction to shift said valve in a closing direction and said link in a.direction to make active the injectng means of the accelerating pump, said mechanism including means for limiting the extent of the closing movement of the valve to prevent. the vacuum in the manifold dropping to a point in proximity to zero.

3. In a speed controlling device for internal combustion engines of automotive vehicles, a carburetor having a throttle, an operable valve controlling manifold vacuum adapted to be interposed between the carburetor and intake manifold of the engine, an actuating link for and adapted to be connected to and for controlling the injecting means of a fuel oil accelerating pump operating means for and common to said valve .and said link, and a vacuum controlled structure having means for establishing com-.

munication between it and the intake manifold of the engine, said structure including a reciprocatory mechanism travelling in one direction, when the engine is started, for moving said operating means in a direction to open said valve and for shifting said link in a direction to make inactive the injecting means of the accelerating pump and travelling in an opposite direction, when the throttle of the engine is completely opened, for moving said operating means in a direction to shift said valve in a closing direction and said link in a direction to make active the injecting means of the accelerating pump, said mechanism including means for limiting the extent of the closing movement of the valve to prevent the vacuum in the manifold dropping to a point in proximity to zero, the said means of said mechanism being resilient and adjustable.

4. In a speed controlling device for internal combustion engines of automotive vehicles, the combination with the throttle valve, carburetor, and intake manifold of an engine, of a pivoted butter-fly valve controlling manifold vacuum, a mounting for said valve interposed between said carburetor and intake manifold, an actuating link for and adapted to be connected to and for controlling the injecting means of a fuel oil accelerating pump, a shifting means for and common to said valve and link, a vacuum cylinder, a pipe connection between one end of said cylinder and the intake manifold, a vacuum operated piston within said cylinder and closing at of the cylinder and pivotally connected to said shifting means, and an adjustable tensioning means carried by said rod and abutting the said other end of the cylinder.

5. In a speed controlling device for internal combustion engines of automotive vehicles, the combination with the throttle valve, carburetor, and intake manifold of an engine, of a pivoted butter-fly valve controlling manifold vacuum, a mounting for said valve interposed between said carburetor and intake manifold, an actuating link for and adapted to be connected to and for controlling the injecting means of a fuel oil accelerating pump, a shifting means for and common to said valve and link, a vacuum cylinder, a pipe connection between one end of said cylinder and the intake manifold, a vacuum operated piston within said cylinder and closing at the extent of its movement inaone direction the pipe to the cylinder, a piston rod carried by the piston extended through the other end of the cylinder and pivotally connected to said shifting means, an adjustable tensioning means carried by said rod and abutting the said other end of the cylinder, and a support to which said cylinder is anchored, said mounting being an integral extention on said support.

6: In a device for the purpose set forth, a

pivoted butterfly valve controlling manifold common to said valve and link, a piston rod car- \ried by the piston extended through the other end of the cylinder, a link pivotally connected to the outer end of said rod and to the said shifting means, a combined spring adjusting and abutment member threadedly engaging with said piston, and a coiled spring encompassing said rod and interposed between said abutment and the said other end of said cylinder.

ALBERT o. TADEWALD. 

